SC28C94 Philips Semiconductors, SC28C94 Datasheet - Page 27

• Manufacturer Part Number: SC28C94
• Description: Quad universal asynchronous receiver/transmitter QUART
• Manufacturer: Philips Semiconductors

Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS
V
NOTE:
1. Consecutive write operations to the upper four bits of the Command Register (CR) require at least three X1/CLK edges; four X1/CLK edges
1998 Aug 19
NO
NO.
CC
1
2
3
4
5
Quad universal asynchronous receiver/transmitter (QUART)
in the ‘X1/CLK divide by 2 edges’ according to register 2E or 2F setting.
NOTE: Rise time of IRQN is dependent on external circuit.
= 5V
DACKN
FIGURE
FIGURE
IACKN
D[7:0]
IRQN
EVAL/HOLD
7
7
7
7
7
10%, T
OSC/N
IACKN
CIR
D[7:0] Valid after IACKN Low
DACKN Low after IACKN Low
D[7:0] floating after IACKN High
DACKN High after IACKN High
IACKN High after IACKN Low
A
= –40_C to 85_C, unless otherwise specified.
CHARACTERISTIC
CHARACTERISTIC
1
Figure 7. Interrupt Knowledge (IACKN) Timing
Figure 8. Interrupt Bid Arbitration Timing
2
VALUE FOR THIS INTERRUPT
27
5
X1 edges
0 + 2
Min
30
0
0
1
LIMITS
Typ
3
4
X1 edges
30 + 3
Max
65
15
15
SD00166
Product specification
SC28C94
1
SD00165
UNIT
UNIT
ns
ns
ns
ns
ns